This untypical Frank Capra romance starts in the Chinese Civil War but soon becomes an unrequited love story between an American missionary in Shanghai (Barbara Stanwyck), and a Chinese feudal warlord (Nils Asther). This is an unusually lavish and beautiful production, epic in the early scenes of conflict, and then opulent at the palace.
The missionary is saved from the chaos of the war by the powerful general. It's a vicarious adventure, as the horrified outsider becomes seduced by the brutal but sensual oriental. As she falls under his influence, she sees him less as an archetype and becomes absorbed by his eroticism.
She fits a common pattern for Americans abroad in cinema: evangelist, naive, hubristic and out of her depth. In trying to save his soul she destroys him utterly even while she falls in love with the man and his aristocratic luxury. He takes poison while she returns home merely chastened by her experience, a more sophisticated woman.
This is a classic of the pre-code era. After 1934, even implying an affair between people of different races would be forbidden, as would the suicide. It's an imaginative and complex film. There is undeniably plenty of racial stereotyping, but actually by the fade out it is the American's intrusive Christianity which seems the more inexplicable, eccentric philosophy.